Superbunching pseudothermal light

Abstract

A novel and simple superbunching pseudothermal light source is introduced based on common instruments such as laser, lens, pinhole and groundglass. g (2) (0) = 3.66 ± 0.02 is observed in the suggested scheme by employing two rotating groundglass. Quantum and classical theories are employed to interpret the observed superbunching effect. It is predicted that g (2) (0) can reach 2 N if N rotating groundglass were employed. These results are helpful to understand the physics of superbunching. The proposed superbunching pseudothermal light may serve as a new type of light to study the second-and higher-order coherence of light and have potential application in improving the visibility of thermal light ghost imaging.

Spectra in nested Mach–Zehnder interferometer experiments

“…The setup was subsequently realized in Ref. [3] and more recently, the experiment was redone in a slightly modified scheme [4], but confirming results of Danan, Farfunik, Bar-Ad, and Vaidman, also another group [5] conducted a similar experiment. These results were actively discussed in recent years (Ref.…”

“…In the setup of Ref. [4], all the mirrors are stationary. There are no mirrors E or F, the first beamsplitter redirects a portion of light directly to the smaller loop, and one of its outputs points directly towards the recombination on the second beam-splitter.…”

“…There are no mirrors E or F, the first beamsplitter redirects a portion of light directly to the smaller loop, and one of its outputs points directly towards the recombination on the second beam-splitter. The small loop is, again, tuned destructively, and electro-optical modula- [4]. Electrooptical modulators modulate phases of the beams with frequencies fA, ..., fF .…”

“…I start with analyzing the scheme of Ref. [4], which is more straight-forward. Between beam-splitters we place EOMs, which simply introduce phase factors.…”

“…The result of the experiment analyzed in Ref. [4] is the power spectrum of this signal, which is the decomposition of it into oscillating terms over a finite duration. For convenience, I choose all frequencies to be multiples of a certain base frequency, so that it is possible to make a decomposition into discrete frequencies.…”